IA-32 architecture
general purpose registers




 
8/16/32bit general purpose registers
 
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9 8 7 6 5 4 3 2 1 0
EAX
reserved AX
AH AL
ECX
reserved CX
CH CL
EDX
reserved DX
DH DL
EBX
reserved BX
BH BL

 
16/32bit general purpose registers
 
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9 8 7 6 5 4 3 2 1 0
ESP
reserved SP
EBP
reserved BP
ESI
reserved SI
EDI
reserved DI

 
16/32bit instruction pointer
 
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9 8 7 6 5 4 3 2 1 0
EIP
reserved IP



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